Economy 6-12 volt electrical system tester. Use to quickly trouble shoot and isolate many common automotive electrical system issues like blown fuses or bulbs and broken wires or connections. Simply attach the mini-alligator clip lead wire to a grounding location and probe electrical wire or connection point with piercing pointed tip of tester. The insulated clear handle of tester will illuminate if wire is hot and circuit is made. Convenient pocket clip for safe secure storage.